Inertia brake



Feb- 19 1935. c; D. PETERSON 1,991,625

INERTIA BRAKE Filed Sept. 14, 1932 y ATTORNEYS.

Patented Feb.V 179, 1935 PATENT .oj/FFICE assignorto Spicerl 1,Manufacturing Corporation@ Toledo; Ohio, aj j corporation of'Yirginia v-Appuetionfseptember 14,1932,serialnaesaieo Y operatedwith aminimumeffora and capable of stoppingtherotating parts of the gearingquickly when the main clutch is thrown out lprelirnfinary to gearshifting operation sothat the gearsare idle during gear`shifts,particularly when a lso called rear clutch is used."

It further :has for its object, 'an inertia brake operated bythethrow-out collarin which the motion of the throW-.outfcollar istransferredvto braking elements through' multiplying levers.

It further has for its, object, a powerful Ainertia brake 'which can `beassembledwithin the space available between the front'wallfof atransmission gear housingand the throw-outeollarof Y,the main clutch.f1; l ,Y

Other objects will fication. V y f The invention consistsin the novelfeatures and in the combinations and constructionshereinafter set forthand claimed. j 'Y in describing 'this invention, referenceis had to theaccompanying drawing...in1r which like characters designatecorresponding s parts in all the views.: v p

Figure 1 isiavertical, .sectional viewthrough this inertiaibrake, thecontiguous partsv of a transmission gearing and lthethroW-.outmechanismof the `mainclutchfbeing also shown.V f

Figure 2 is a face View of partsseen i-n Figure l.. .Figure isasectionalivi'ew on line. 3 3, Fig.- ure2.V Y

This inertia brake. comprises. generally vcoact-y ing friction members.'one of which is xedfrom rotationgwith theg-driveshaft of thetransmission gearing, and-the other of which is rotatable with saidshaft, and motion transmitting and multiplying levers between thethrow-out sleeve or collar of the main clutch andY said friction member.

'Ihe transmission gearing may be of any Well known form, size andconstruction, and have the usual housing with the shafts and gearstherein.

1 designates the front wall of a gear housing.

2 is the drive shaft of the gearing, which is the stem of a gear 3located in the housing. 'I'his gear 3, as will be understood by thoseskilled in the art, meshes with a gear onthe countershaft,

appear vtthroughout the speci-'v' solams. Y1on1, 192;'18.)

not shown; in the housing'. The shaft 2 is formed Withnthe. usualsocket.4 for the pilot bearing of the transmission shaft, not shown, vand vthegear V3 Vis formed with an internalolutch face5 which coacts with acomplemental clutch face on a gear element slidable 'on the transmissionshaft. 'Ihe shaft 2zismounted inthe usual .anti-friction bear: ing.6located in abearing opening 7 in the end Wall-1 ofthe gear housing.

8 designates' generally, the throw-out collar for the main clutch,Y thiscollar moving rearwardly, or te .theright Figure 1, whenl the clutch isdis-l engaged, and being operatedfbyla clutch pedal `in the .usualmanner... This collar may be of any suitable: form, size and`construction, and in cludes an inner part or sleeve 9 rotatable on theshaft 2, and an .outer part or collar v10 with an antisfriction bearing1v1 between them. The

Vthrow-out yoke, not showncoacts` with the collar' 110, as will. be`understood by these skilledin the Vart'.A The construction of thethrow-out mechanism formano part of this invention.v

` The inertia brake includes abodyl` 1-2`detachably mounted on 'the` endWall 1, this being 1 preferably in the form of a drum having a headlying against Y the end Wall: land an opening 13 around the shaft 2.It'- isi also formed with an annular hub 14 which extends intothe-bearing opening '7 to center the body relatively tothe shaft. Thebody is secured in positionin any suitable-manner, as by screw/S5175Vextendingthrough thev head and tl-ireading into the endY Wall 1. u Theannular, or cylindriealfwallof the drum is formed with internal teeth16,and the "shaft 2 is also preferably formed -with'anexternal Vtoothedface 17. The

friction,members'arehereshownl as sets of interleaved disks, onesetbeing interlocked with the drum-'or with said teethl;` and theV otherset with the shaft'or the 'teeth V17. 4

l18` designates the disks which are interloeked withsthe teeth 16s,'orthe drumY 12, and'19 the set which rotates with the shaft 2, this beinga single disk mounted on the hubZQhaving teeth lcomplementalto thetoothedface A117; "'21 is'an abutment ring seated in an annular recessin the head 12 and overlying the heads of the screws 15.

23 is an outer abutment ring rotatable with the drumand thrustingagainst one of the disks 18. The disks 18 are preferably of a fibrousmaterial, and the disk 19 of steel.

30 designates one of the motion transmitting and multiplying levers,there being a plurality and preferably, three of such levers. Each lever4abutment ring 23. Each lever is acted upon by a spring 35 tending topress it away from the disk 23.

In operation, when the throw-out collar 10 is moved rearwardly, yor tothe right, that is, toward the end wall of the gear housing, it engagesand depresses the levers 30 causing the levers to compress the disks andhence, stop the rotation of the shafts of the gearing. Owing to thelevers 30 comparatively great force can be applied to the disks with aminimum force applied to the throw-out collar 10 from the clutch pedal,so that the inertia of a heavy countershaft and gears is quicklyovercome witha minimum ef-` fort. Also, the brake can be readily appliedtov the gear box. Furthermore, owing to the brake construction, thebrakeis particularly compact and at the same time powerful, and can beplaced in a small available space between the gear box andthethrow-outcollar. l

What I claim ist' 1. The combination with a transmission gear-- ingincluding a housing and a drive shaft journalled in the housing andextending through an end wall thereof, and a main clutch throw-outcollar shiftable on said shaft; of an inertia brake comprising coactingfriction membersone being fixed relatively to said wall and the otherrotatable with said shaft, and a lever pivotally connected to said walland operable by the throwout collar to engage said friction members.

2. The' combination with av transmission gearing including a housing anda drive shaft journalled in the housingand extending-through an end wallthereof, and a main clutch throw-,out

collar shiftable on said shaft; of an inertia brake" comprising coactingfriction members, one being xed relatively tosaid wall and the otherrotatable with said shaft, and levers pivotalliT connected to said walland operable by the throwout collar to engage saidv friction members,said levers extending in radial directions `relatively to the shaft andbeing pivoted at their outer ends and having their inner .ends arrangedto thrust against the throw-out collar and bearing intermediate of theirends on one of said members. v

3. The combination of a transmission gearing including a housing, and adrive shaft journalled in the casing and extending through. anV end wallthereof, Vand a main clutch throw-out collar shiftable on said shaft; ofan inertia brake comprising a drum on said wall concentric with theVshaft, sets of interleaved disks interlocked respectively with the drumand the shaft, means for compressing the disks including levers pivotedto the drum and coacting with saidrdisks and with the throw-out collar.Y

A. The combination of a transmission gearing includingahousing, and adrive shaft journalled Vin the housing and extending through an end wallthereof, and a main clutch throw-out collar shiftable on said shaft; ofan inertia brake compris-Y i' ing a drum on said wall concentric with"the shaft, sets of interleaved Vdisks interlocked respectively with thedrum andthe shaft, means for compressing the disks including leverspivoted to the drum and coacting with said disks and with the throw-outbearing, said levers `extending radiallyrelatively to the shaftand'being pivoted at theirlouterfends tothe ydrum and coacting'attheir'inner ends with the throw-out collar.

' 5. The combination with a transmission, geari i ing-including ahousing, and a drive shaft journalled in thek housing and extendingthrough an endwall thereof, said 'end wallhaving a bearing opening forthe shaft, and a main clutch throwout collar shiftable axially of saidshaft; of an` Y inertia. brake comprising a drum having a head' iabutting against said end wall, anda hub fitting interleaved disksslidable axiallyrof the. shaft and .'20 the drum, one` set beingvinterlocked `vviththe annular -wall of the drum,.and the-otherwith-the.

the'annular Wall of said bearing opening, sets oi shaft', and leverspivoted fat theirouter ends to v* thedrumand thrusting .at theirinnerfreeends against. the. throw-out.v collar, Asaid levers coactingbetween their ends with one of said disks.

6. The combination with a transmissiongear- .Y

ing including ahousing, a drive shaft'journalled in the housing andextending Vthrough an end wallther'eof, said end wall being providedwithv a bearing opening for the shaft, andamain clutch throw-out collarshiftable axially of thes'haft, of.v an inertia lbrake comprising a drummountedl on said end wall concentric with the shaft, and said shaftprovided with-a. peripheral toothed Vface within .the drum, sets ofV,interleaved disks, one` set being slidably interlocked with the drum',andY 1 the other set with saidtoothed face of the shaft,

and leverscpivoted `at their outer ends to Nthe drum and 'coacting attheir.. inner ends with said throw-out collar, VKand between their'endswith said! disks.

7. vThe combination with a transmission gearingincludinga housing, andandrive shaft journalled inv the housing and extending through an endwall thereof, a mainclutch throw-outvcollarV shiftable on said shaft;'of an inertia brakecarried entirely' by said l'end wall and the shaftand includingV oactingvfriction members and motion transmittingandVmultiplying levers for engaging them, arrangedgin'the path of thethrow-out collar.

8. The combination with vatransmission gearing including a housing, andaHriveshaftjournalled in the Yhousing and extendingthrough an,

transmitting and multiplying levers for com-1 end Wall'thereof, amainclutchthroW-Ioutcollar f shiftable on saidshaft'; ofan inertiabrakecar-jf ried entirely by saidY end wall 'and the ,shaftjand Yincluding interleaved Ybrake disks and motionY pressing the disks'arrangedinr the path of the:

throw-out collar.

